.head {

  height: 45px;
  line-height: 45px;
  border-bottom: 1px solid #eee;
  width: 100%;
  background-color: #303030;
  z-index: 100;
  text-align: left;
}

ul,li{
  display: inline-block;
}

.logo_box{
  width:100px;
  display: inline-block;
  text-align:center;
  line-height: 60px;
}

.menu a,.logo_box a{
  display: inline-block;
  height:45px;
  color:#ddd;
}